LANCASTER COUNTY, Pa. - ton Bank remains the largest bank in Lancaster County, new federal statistics show.But some rivals have narrowed the lead via acquisitions.Lancaster-based Fulton has 20.00 percent of all bank deposits here, according to the latest Federal Deposit Insurance Corp. figures.The local leader for at least 15 years, Fulton stayed in front despite a slight drop in market share from 2007, when it had 20.75 percent of local deposits.While Fulton's still in first, its lead has been whittled to less than 1 percentage point, down from about 5 last ...